Malicious PDF — malware analysis report

Static analysis result for SHA-256 6453e9caa0700b67…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 04:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5c29644ee5f0638b4fb15850da49b660 SHA-1: 686146b012ab38f2523f7b1e0ca004d43d1b440f SHA-256: 6453e9caa0700b67d5c25b7f066e9b8b182b75e7cdcfe96a247365ed17f12b0b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URIs, with a primary suspicious URL being https://resalured.ru/wix?keyword=rgb+led+cube+diy. The presence of multiple links on disposable hosting and the overall structure suggest it's part of a campaign to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/wix?keyword=rgb+led+cube+diy PDF link annotation
    • https://xutorobufazam.weebly.com/uploads/1/3/5/3/135345650/lotudovozopijaniv.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/FghidUC/john_gba_lite_ios.pdfIn PDF document text
    • http://govnosiakxws.online/94363512605hd85v.pdfIn PDF document text
    • https://motonolezigit.weebly.com/uploads/1/3/2/8/132814123/c413ea7.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/icjizYD/zexawuzevosu.pdfIn PDF document text
    • https://cdn.sqhk.co/pivoledofag/ifOsrz3/platform_games_pc_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/jjjfjgo/fifaxifelemusuvu.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/7161117.pdfIn PDF document text
    • http://titoto.xyz/microsoft_office_animated_powerpoint_templates2onej.pdfIn PDF document text
    • http://presentinsta.online/31431686296bwfgh.pdfIn PDF document text
    • http://2022god.com/412208625636c46n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/225064af-a6a9-4427-960c-0b7d8c08a27f/common_core_math_standards_grade_3_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa8ff47a-def1-4d6f-a343-4b5503df68cd/troy-bilt_storm_2410_2-stage_electric_start_snow_blower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc297ea-f217-447c-b730-d0ee8e2b5d95/what_are_calluses_on_your_feet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6e7211-87e0-496b-a2fe-250167f076c0/why_you_feel_what_you_feel_alan_watkins_tedxoxford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d10890-4975-4048-b9fe-ac279fe18ba0/what_is_bilingualism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e64d18-9148-4317-84a9-2b818922c243/gaxufaviwopemepebax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735bea04-af11-4ea2-8097-db563c44d93a/relatanag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56439afd-898e-411b-b627-e83e32786e22/lincoln_ac_225_stick_welder_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d59d75-2dc3-48ed-bea2-eaf2348cd1a5/adobe_flash_player_blocked_plug_in_chrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c478b940-525a-4a9a-81f5-bf4ccd0ab88b/what_is_the_meaning_of_legal_deterrence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5266cb1c-8091-4f64-b13f-b692b75eeab1/16877380261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dfb1042-583e-474a-90c6-952d0ce02338/business_law_textbooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1104647f-6477-4963-b827-38af4fb025dd/vazopawelukirikop.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE654 4872 bytes
SHA-256: 505ff0583fcbca7b5e34ed1dd85d968d1f4affe7430052fd03840c8c33f0191f
font_01_sfnt_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 21000 bytes
SHA-256: a6e4eb90ab860fc945e0353fb8ea54b777f52cee428ff0a75db543afd7777c5d

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